/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

using Token = Lucene.Net.Analysis.Token;

namespace Lucene.Net.Index
{
    internal sealed class DocInverterPerThread : DocFieldConsumerPerThread
    {
        internal readonly DocInverter docInverter;
        internal readonly InvertedDocConsumerPerThread consumer;
        internal readonly InvertedDocEndConsumerPerThread endConsumer;
        internal readonly Token localToken = new Token();
        internal readonly DocumentsWriter.DocState docState;

        internal readonly DocInverter.FieldInvertState fieldState = new DocInverter.FieldInvertState();

        // Used to read a string value for a field
        internal readonly ReusableStringReader stringReader = new ReusableStringReader();

        public DocInverterPerThread(DocFieldProcessorPerThread docFieldProcessorPerThread, DocInverter docInverter)
        {
            this.docInverter = docInverter;
            docState = docFieldProcessorPerThread.docState;
            consumer = docInverter.consumer.addThread(this);
            endConsumer = docInverter.endConsumer.addThread(this);
        }

        internal override void startDocument()
        {
            consumer.startDocument();
            endConsumer.startDocument();
        }

        internal override DocumentsWriter.DocWriter finishDocument()
        {
            // TODO: allow endConsumer.finishDocument to also return
            // a DocWriter
            endConsumer.finishDocument();
            return consumer.finishDocument();
        }

        internal override void abort()
        {
            try
            {
                consumer.abort();
            }
            finally
            {
                endConsumer.abort();
            }
        }

        internal override DocFieldConsumerPerField addField(FieldInfo fi)
        {
            return new DocInverterPerField(this, fi);
        }
    }
}
